How To Mirror Interpolation Mode
Open the N Panel in the graph editor and go to the F-Curve sub-panel.
Change the Easing Type of the left keyframe from Ease In to Ease Out.
Alternatively, while the left keyframe is selected, Right-Click &gt; Easing Type &gt; Ease Out.
Another solution, use the shortcut Ctrl + E &gt; Ease Out while the left keyframe is selected.
Ease In:

Ease Out: